Honda Accord 2021 — technical service bulletin
Bulletin A21-021 · NHTSA communication 10199748 · issued Jul 29, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
4
vehicle entries
Official summary
Service Bulletin - The MIL comes on with DTC U0155 (Lost Communication with Gauge Control Module).
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.